11086109635561 has 3 divisors (see below), whose sum is σ = 11086112965143. Its totient is φ = 11086106305980.

The previous prime is 11086109635547. The next prime is 11086109635609. The reversal of 11086109635561 is 16553690168011.

The square root of 11086109635561 is 3329581.

It is a perfect power (a square), and thus also a powerful number.

11086109635561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 52684479961 + 11033425155600 = 229531^2 + 3321660^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11086109635561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11086109635499 and 11086109635508.

It is not an unprimeable number, because it can be changed into a prime (11086109635061) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1664791 + ... + 4994371.

It is an arithmetic number, because the mean of its divisors is an integer number (3695370988381).

Almost surely, 2^{11086109635561} is an apocalyptic number.

11086109635561 is the 3329581-st square number.

11086109635561 is the 1664791-st centered octagonal number.

It is an amenable number.

11086109635561 is a deficient number, since it is larger than the sum of its proper divisors (3329582).

11086109635561 is an frugal number, since it uses more digits than its factorization.

11086109635561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6659162 (or 3329581 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 52.

The spelling of 11086109635561 in words is "eleven trillion, eighty-six billion, one hundred nine million, six hundred thirty-five thousand, five hundred sixty-one".